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动力、能源类 :电源、发动机、电机、电池、螺旋桨、减速箱、电子燃油控制等;
Power and energy : power, engine, motor, battery, propeller, reducer, electronic fuel control, etc. ;
youdao
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动力、能源类 :电源、发动机、电机、电池、螺旋桨、减速箱、电子燃油控制等;
Power and energy : power, engine, motor, battery, propeller, reducer, electronic fuel control, etc. ;
youdao